Information Technology Reference
In-Depth Information
MED
Multi-Exit Discriminator. A BGP attribute exchanged among autonomous
systems to affect inbound traffic flows.
MPLS
Multiprotocol Label Switching. An IETF standard for packet forwarding
using labels.
MSDP
Multicast Source Discovery Protocol. A mechanism to connect multiple
PIM sparse-mode domains.
MTU
maximum transmission unit. The maximum packet size, in bytes, that a
particular interface can transmit.
NH
next hop. The IP address of the next router to be used to reach a specific
destination.
NLRI
Network Layer Reachability Information. Prefixes exchanged among BGP
speakers.
NSF
Non-Stop Forwarding. A mechanism in which a router continues to forward
or receive packets forwarded during transient failure conditions.
ORF
Outbound Route Filtering. A form of filtering performed by a sender to
suppress the routing information that will later be denied on the receiver.
OSPF
Open Shortest Path First. An IETF protocol for exchanging interior
routing information.
Provider router. A provider core router device in an MPLS VPN network.
P
PE
Provider edge router. This device connects to one or more customer sites in
the service provider network.
PHP
Penultimate Hop Popping. The top label is popped by the router that is one
hop immediately prior to the edge label switch router.
PIM
Protocol-Independent Multicast. An IETF protocol to disseminate multicast
routing information. PIM is unicast routing protocol-independent. It can operate
in different modes, such as sparse mode and dense mode.
POP
point of presence. The part of a service provider network that provides
interconnections to customers and other networks.
Packet over SONET. An IETF protocol to carry packets over SONET.
POS
